About the Assessment Methods
Naranjo Algorithm
A questionnaire-based method that assigns probabilities of causation (definite, probable, possible, doubtful) based on a scoring system.
WHO-UMC Scale
The World Health Organization-Uppsala Monitoring Centre system categorizes causality into levels like certain, probable, possible, and unlikely based on clinical assessment.
European ABO System (French Method)
A method used in French pharmacovigilance that provides a structured assessment based on chronological, semiological, and bibliographical criteria. It produces a final imputability score.
Liverpool Causality Assessment Tool (LCAT)
A structured tool developed primarily to assess causality in drug-induced liver injury, but its principles are widely applied.